The research is designed to explore consumers’ opinions about the renowned companies of Bangladesh in terms of maintaining an ethical standard in advertisements. Competition is very high among the top four business giants- Square Group, Akij Group, Bashundhara Group, and ACI Limited. This research digs the consumer base to find out whether they think that these companies maintain ethical principles, ensure customer’s rights, meet customers’ expectations and maintain quality as promised in TV commercials or not. Upon the findings, some recommendations are made for the companies to gain consumers’ trust by improving marketing strategies.